Property Processing Dialog Box Description

When performing operations like geometry intersection, merge, XOR, or line connection, it is essential to consider attribute assignment for newly generated objects. The application provides the Property Processing dialog box to facilitate attribute settings for post-operation objects. This section uses the merge operation as an example to explain the Property Processing dialog box.

Editing Layer

The drop-down list on the right side of the Editing Layer tab displays all editable layers in the Layer Manager. When multiple layers are editable, you need to select the target layer for the merge operation, i.e., the layer where merged objects will ultimately reside. Objects in other layers remain unchanged.

List Box

The list box displays all non-system fields and editable system fields of merged objects, including their names, types, and processing methods for post-merge values. To modify a field's processing method, select the field in the list box and choose a new method from the Actions column.

Parameter Description

  • Null: The field value of the union result object will be empty.
  • Sum: The field value of the union result object will be the sum of corresponding field values from all merged objects. Numeric fields are summed directly. For text fields, values from multiple objects are concatenated in SmID order.
  • Weighted Mean: The field value (must be numeric) of the union result object will be the average of all merged objects' values. This supports both simple average and weighted mean calculations (default is simple average).

    Select the Average radio button and choose No Weighting Field (Average) from the drop-down menu to calculate a simple average (sum of source objects' values divided by object count).

    To calculate a weighted mean, select a weighting field from the drop-down menu adjacent to the Average radio button.

  • Save Geometry: The field value of the result object will match the nth selected object's value. When switching selection, corresponding objects are highlighted on the map for clear spatial identification.
  • Delete Source Object: Determines whether to delete objects from non-current editing layers during cross-layer merging. Enabled by default; uncheck to retain objects from non-current editing layers.